George t



G. T. LAPE.` Carpentere Gage.

Patented Feb. 5, 1867.

y Vl Illll I e N.PE|'ERS. Pnofo-urHOGR-VAPHER. WASHINGTDN. D C.

uit@ ftatl @anni IMPROVEMENT IN GABPENTERS GAUGES.

' lO ALL WHOMI'I MAY CONC-EBN:

Be it known that I, GEORGE T. IJAPF., of the city, county, and State of New York, have invented new and useful Improvement in a Joiner-'s Gauge; and I do hereby declare that the following is afull, clear, and exact ,description thereof, which will enable others skilled in the art to make and use the same, reference being had 'to the accompanying drawings, forming part' of this speeiication, in which- Figure l is a side view of my improved gauge.

Figure is aseetion of the head-block, taken in the line xx, tig. I.

Figure 3, a longitudinal section of the gauge, taken in the line yy, tig. 2.

Figure 4 is a cross-section taken through the head-block, in the line z z, tig. l.

Similar letters of refere icate like parts.

This invention relates to 'ovements in joiners gauges, for' the purpose of rendering them more useful and convenient, and consists in combining two rectangular bars, which are tongued and grooved, and form a square gauge-bar on which a ,head-block moves,by rack and pinion, in such manner as to admit of the nicest measurements, on a graduated scale, between the head-block and the marking point. The double gauge-hars are also made to slide upon each other, so as to separate two marking points-to any required distance, for gauging a mortise or any similar work with two parallel lines. l

, The square gauge-bar is formed in-two equal sections, longitudinally, A A', one of which is tongued and the other grooved, as shown in iig. 4, so thatthey can slide and extend lengthwise. rhey are held together hy Athe head-block B, within a recessin which is placed a rnetall pinion, a, fig. 3, that works by means of a thumb` shaft, b, in a rack, a', upon the side of either of the half sections of the gauge-bur. for the purpose of moving the head-block nearer to, or farther from, the'marking point c. On the side of the gauge, oppositethaton .which is placed the marking pointc, are placed double marking points, one of which, d, is set in the but end the section A, and the other, d', in the sliding end of the section A', as shown in iig, 3. The two sections A A are also held together b v a thumb-screw, e, passing through the but end of section A', which. screws into the end of section A and forces the two sections together endwise, so that the two marking points c and d', on opposite sides of the gauge, are directly in the same transverse line, and therefore equidistant from the headhloek B. `But when the screw e is disengaged from the section A, the two sections are then free to slide back and forth sov that the small, end of the section Al may be moved from the but end of the section A, and the marking points cl d may be separated any required distance for gauging a mortise, or other similar work, with both points at once. The head-block is provided with two set-screws, one of which, g,.operates for securing the block in position for gauging with the double marking points d d. Both the set-screws, g g', are released for shifting the gauge-picks, or marking points, and both are screwed up when they are set for use, either single or double, and thus the gauge is conveniently set to any distance on the graduated scale, and the head-block is made rigidly fast, as desired. The sides of the gauge are graduated with scales of any required divisions of an inch, in lthe usual way. The marking point or pick c passes through from the top of the tongue upon section A, and the point d passes through fi'omthe bottom of the groove in section A; the point d also .passes through. the but end of thc-section A, as shown in fig. In the centre of the gauge-bar I introduce n metal block, h, between theinarking points c and d, aud in the end there is placed a set-screw, k, the-point of which bears against-the markinrf oint d when it is screwed u and thus ressinrr u on the metal block hticrhtens both the C o p 7 p p o I) v ,t a

points e and d togethervfi'rmly, as shown in tig. 3.

Having described my invention, I claim as new, and desire to secure by Letters Patent- An improved joiners gauge, formed of two sliding longitudinal sections A A', combined with the rack `a' and pinion a; the set-screws gg in the head-block B, and the double marking points d cl', arranged and operating as and for the purposes herein described. 4

The above specification of my invention signed by me this 28th day of November,l1866.

GEO. 'I'. LAPE,

Witnesses:

WM. F. McNAMAnA, O. D. MUNN.' 

